Hi everyone. I'm an 18 year old male 180 about 15% bodyfat. I'm an athlete that trains at least 4 hours per day, 6 days a week. I have terrible stomach bloating. When I wake up in the morning my stomach can be completely flat with the makings of a 6-pack. After a meal, even a small one my stomach expands in a completely unnatural looking way. It is one solid mass not fat just a ball there. The odd thing is I can totally suck it in and my stomach will look the way it did in the morning as long as I flex my stomach. But the moment I let go it expands again. Can anyone tell me what is going on please?

You have a stomach and you are seeing the physical meal being digested. You have muscles around the gut that has to flex just like any other skeletal muscle. When you suck in, you are just shifting your gut upwards into your thoracic cavity by compressing the lungs. You have to realize that the human body is not a statue like the statue of David. Yes, you are training a lot to get physical results but you must remember that the physical body changes with just the physical process of eating. I don't believe that you are having true gas bloating because it happens immediately. True bloating due to gas would take 2-5 hours to see.

When you see these power training, show guys that go to show off their body they deprive themselves the week of showing. They undergo a rigorous run up to show schedule to maximize their appearance.

Beware, I suspect that you are overtraining. 4 hours per day on 6 days of the week. That is a significant amount of training for your age group. I'm not sure of what intensity that you are working at. I seriously suggest that you see a sports medical physician or a CSCS certified personal trainer. You may really be doing yourself harm and not maximizing your physical gain from training by overtraining.